diff --git a/coinmanager/coinc/models.py b/coinmanager/coinc/models.py
index 5063565..bf4bfef 100644
--- a/coinmanager/coinc/models.py
+++ b/coinmanager/coinc/models.py
@@ -1,6 +1,6 @@
 # encoding: utf-8
 #
-# Copyright (C) 2020 willipink.eu
+# Copyright (C) 2020-2022 willipink.eu
 # Author Moritz Münch moritzmuench@mailbox.org
 #
 # This program is free software: you can redistribute it and/or modify
@@ -20,7 +20,7 @@
 
 from datetime import datetime, date
 
-from django.db.models import BooleanField, CASCADE, CharField, DateField, DateTimeField, ForeignKey, Model, PositiveIntegerField, PositiveSmallIntegerField, TextField
+from django.db.models import BigAutoField, BooleanField, CASCADE, CharField, DateField, DateTimeField, ForeignKey, Model, PositiveIntegerField, PositiveSmallIntegerField, TextField
 
 
 year_now        = int(datetime.now().year)
@@ -28,6 +28,8 @@ year_now        = int(datetime.now().year)
 
 
 class User(Model):
+    id              = BigAutoField(primary_key=True)
+
     name            = CharField('Name', max_length=20, default='Anonym')
 
     color           = CharField('Farbe', max_length=20, default='purple')
@@ -71,6 +73,8 @@ class Stamp(Model):
 
 
 class Coin(Model):
+    id              = BigAutoField(primary_key=True)
+
     value           = PositiveSmallIntegerField('Wert', default=100)
 
     year            = PositiveSmallIntegerField('Jahr', default=year_now)